Gear shift fork oscillation test fixture

Abstract

The utility model relates to the technical field of automobile accessory detection, disclose gear shift fork oscillation test frock, including shift fork foot, flat plate and shift fork foot support, one end of shift fork foot is equipped with the crash component, the outside of shift fork foot is equipped with fixed component, the crash component includes recessed groove, recessed groove fixed connection one end at shift fork foot, the outside fixed connection of shift fork foot support has convex groove, the inside setting of convex groove is at recessed groove, fixed component includes piston connection, piston connection fixed connection one end at shift fork foot, the inside setting of piston connection has connecting rod. In the utility model, gear shift fork oscillation test frock, simulate the durability test of gearbox actual gear shifting condition, after the appearance inspection and the analysis result of cutting inspection weld after the test, prevent batch welding to be bad to flow out, prevent the automobile gear shifting failure from being recalled due to the welding problem.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts testing technology, and in particular to a gear shift fork vibration test fixture. Background Technology

[0002] The shift fork is a key component in a car's transmission, primarily used in the transmission systems of manual and some automatic vehicles. It shifts gears by moving gears, maintaining the appropriate gear ratio between the engine and wheels under different operating conditions. This enables operations such as starting, accelerating, decelerating, and reversing the car, directly affecting the accuracy and smoothness of gear shifting.

[0003] Existing gear shift fork oscillation test fixtures typically use a mechanical fixing structure to secure the shift fork and a motor-driven eccentric wheel mechanism to simulate oscillation motion under actual working conditions. However, this method simulates only a single working condition and cannot accurately reproduce real-world usage scenarios, leading to deviations in test results. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a gear shift fork vibration test fixture, which aims to improve the problem of the lack of testing of welded parts through simulated vibration experiments in the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A gear shift fork vibration test fixture includes a shift fork foot, a plate and a shift fork foot support, wherein a collision component is installed at one end of the shift fork foot and a fixing component is installed on the outer side of the shift fork foot;

[0007] The collision component includes a concave groove, which is fixedly connected to one end of the shift fork foot. A convex groove is fixedly connected to the outer side of the shift fork foot support, and the convex groove is disposed inside the concave groove.

[0008] As a further description of the above technical solution:

[0009] The fixing assembly includes a piston connection, which is fixedly connected to one end of the shift fork foot. A connecting rod is provided inside the piston connection, and two nuts are threaded to one end of the connecting rod. The two nuts are located on both sides of the piston connection.

[0010] As a further description of the above technical solution:

[0011] The top of the plate is provided with a T-shaped groove, and the interior of the T-shaped groove on both sides is slidably connected with a first fork support and a second fork support.

[0012] As a further description of the above technical solution:

[0013] Both the bottom of the first shift fork support and the second shift fork support are threaded with bolts, and the bolts are threaded inside the plate.

[0014] As a further description of the above technical solution:

[0015] Both the first shift fork support and the second shift fork support have circular grooves inside, and the circular grooves are located at the top of the first shift fork support and the second shift fork support.

[0016] As a further description of the above technical solution:

[0017] An injection head is rotatably connected inside the circular groove, and the injection head is located on the inner wall of the first shift fork support and the second shift fork support;

[0018] As a further description of the above technical solution:

[0019] A 5 / 7 shift fork is fixedly connected between the two injection heads;

[0020] As a further description of the above technical solution:

[0021] The bottom of the plate is fixedly connected to a heightening block, which is a rectangular block located on the front and rear sides of the plate.

[0022] This utility model has the following beneficial effects:

[0023] In this utility model, a gear shift fork vibration test fixture was developed to simulate the actual shifting conditions inside the gearbox for durability testing. After the test was completed, the results were analyzed by visual inspection and weld inspection. This was done to prevent batches of defective welds from being released and to prevent recalls of cars that could not shift gears properly due to welding problems. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the gear shift fork vibration test fixture proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the nut structure of the gear shift fork vibration test fixture proposed in this utility model;

[0026] Figure 3 This is a top view of the gear shift fork vibration test fixture proposed in this utility model;

[0027] Figure 4 This is a front view of the gear shift fork vibration test fixture proposed in this utility model;

[0028] Figure 5 This is a right view of the gear shift fork vibration test fixture proposed in this utility model.

[0029] Legend:

[0030] 1. Connecting rod; 2. Flat plate; 3. Second shift fork support; 4. First shift fork support; 5. 5 / 7 shift fork; 6. Nut; 7. Piston connection; 8. Shift fork foot support; 9. Heightening block; 10. Injection head; 11. Shift fork foot; 12. Bolt; 13. T-slot; 14. Round groove; 15. Concave groove; 16. Convex groove. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 and Figure 2 An embodiment of this utility model provides a gear shift fork vibration test fixture, including a shift fork foot 11, a plate 2 and a shift fork foot support 8, characterized in that: a collision component is installed at one end of the shift fork foot 11, and a fixing component is installed on the outer side of the shift fork foot 11.

[0033] The collision assembly includes a concave groove 15, which is made of high-strength alloy steel and integrally formed by precision casting. Its inner wall is finely ground. The concave groove 15 is fixedly connected to one end of the shift fork foot 11. A convex groove 16 is fixedly connected to the outside of the shift fork foot support 8. The shift fork foot support 8 is also made of high-strength alloy steel, and the convex groove 16 is precisely milled on its outside using CNC machining technology. The size of the convex groove 16 is strictly matched with the concave groove 15. The shift fork foot 11 is fixedly connected to the outside of the 5 / 7 shift fork 5.

[0034] Reference Figure 1 , Figure 3 and Figure 5 The fixing component includes a piston connection 7, which is made of high-quality aluminum alloy and features light weight and high strength. The piston connection 7 is fixedly connected to one end of the shift fork foot 11. The piston connection 7 has a connecting rod 1 inside, and the surface of the connecting rod 1 is coated with a wear-resistant layer to enhance its wear resistance and corrosion resistance. One end of the connecting rod 1 is threaded with two nuts 6, which are located on both sides of the piston connection 7. By tightening the nuts 6, the connecting rod 1 can be firmly fixed to the piston connection 7. At the same time, the extension length of the connecting rod 1 can be precisely adjusted by adjusting the position of the nuts 6 to adapt to different specifications of shift fork feet 11 and test requirements. The other end of the connecting rod 1 is mounted on the rotating mechanism of the motor, similar to a rotating rod. When the rotating rod rotates, the connecting rod 1 rotates vertically around the first shift fork support 4.

[0035] Reference Figure 1 Figure 2 , Figure 4 and Figure 5 A convex groove 16 is located inside the concave groove 15. A T-slot 13 is provided on the top of the plate 2. The plate 2, as the basic load-bearing component of the entire test fixture, is made of high-strength, high-rigidity steel plate, and its surface is processed by a surface grinder. The T-slot 13 can accommodate sliding components to ensure smooth sliding. The first fork support 4 and the second fork support 3 are slidably connected inside the T-slots 13 on both sides. The first fork support 4 and the second fork support 3 are also made of high-strength alloy steel, and their bottoms are designed with slider structures that match the T-slots 13. Bolts 12 are threadedly connected to the bottoms of the first fork support 4 and the second fork support 3. By tightening the bolts 12, the first fork support 4 and the second fork support 3 can be firmly fixed to the plate 2 to ensure that no displacement occurs during the test. The bolts 12 are threadedly connected inside the plate 2. The interior of each of the three components has a circular groove 14. The inner wall of the circular groove 14 is machined to have a smooth surface and precise dimensions. The circular groove 14 is located at the top of the first shift fork support 4 and the second shift fork support 3. An injection head 10 is rotatably connected inside the circular groove 14. The injection head 10 is made of high-performance plastic injection molding, which has good wear resistance and self-lubrication. It can rotate flexibly within the circular groove 14. The injection head 10 is located on the inner wall of the first shift fork support 4 and the second shift fork support 3. A 5 / 7 shift fork 5 is fixedly connected between the two injection heads 10. It swings freely within a certain range to truly simulate the motion state of the shift fork in actual work. A heightening block 9 is fixedly connected to the bottom of the plate 2. The heightening block 9 is a rectangular block located on the front and rear sides of the plate 2. The heightening block 9 increases the bottom support area of ​​the fixture, effectively improving the stability of the fixture during the test, reducing errors caused by vibration, and ensuring the accuracy of the test results.

[0036] Working principle: First, place the concave groove 15 of the shift fork 5's shift fork foot 11 onto the convex groove 16 of the shift fork foot support 8. At this time, start the servo motor connected to the connecting rod 1. The motor rotates, the connecting rod 1 reciprocates, and drives the injection head 10 to reciprocate smoothly.

[0037] Then, by detecting the actual pressure value of the shift fork foot through the pressure sensor, the servo motor is controlled to drive the connecting rod to make the concave groove 15 of the shift fork foot 11 of the 5 / 7 gear shift fork 5 reciprocate to collide with the convex groove 16 of the shift fork foot support 8. The number of collisions is set to complete the durability test. Finally, after the test is completed, the results are analyzed by visual inspection and weld inspection.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gear shift fork vibration test fixture, comprising a shift fork foot (11), a plate (2), and a shift fork foot support (8), characterized in that: A collision component is installed at one end of the fork foot (11), and a fixing component is installed on the outside of the fork foot (11). The collision assembly includes a concave groove (15), which is fixedly connected to one end of the shift fork foot (11). A convex groove (16) is fixedly connected to the outside of the shift fork foot support (8), and the convex groove (16) is disposed inside the concave groove (15).

2. The gear shift fork vibration test fixture according to claim 1, characterized in that: The fixing assembly includes a piston connection (7), which is fixedly connected to one end of the shift fork foot (11). A connecting rod (1) is provided inside the piston connection (7). Two nuts (6) are threaded to one end of the connecting rod (1), and the two nuts (6) are located on both sides of the piston connection (7).

3. The gear shift fork vibration test fixture according to claim 1, characterized in that: The top of the plate (2) is provided with a T-shaped groove (13), and the interior of the T-shaped groove (13) on both sides is slidably connected with a first fork support (4) and a second fork support (3).

4. The gear shift fork vibration test fixture according to claim 3, characterized in that: The bottom of the first shift fork support (4) and the second shift fork support (3) are both threaded with bolts (12), which are threaded inside the plate (2).

5. The gear shift fork vibration test fixture according to claim 4, characterized in that: Both the first shift fork support (4) and the second shift fork support (3) have a circular groove (14) inside, and the circular groove (14) is located at the top of the first shift fork support (4) and the second shift fork support (3).

6. The gear shift fork vibration test fixture according to claim 5, characterized in that: An injection head (10) is rotatably connected inside the circular groove (14), and the injection head (10) is located on the inner wall of the first shift fork support (4) and the second shift fork support (3).

7. The gear shift fork vibration test fixture according to claim 6, characterized in that: A 5 / 7 shift fork (5) is fixedly connected between the two injection heads (10).

8. The gear shift fork vibration test fixture according to claim 1, characterized in that: The bottom of the plate (2) is fixedly connected to a heightening block (9), which is a rectangular block located on the front and rear sides of the plate (2).

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